The Experts below are selected from a list of 32868 Experts worldwide ranked by ideXlab platform
Abdullah M Asiri - One of the best experts on this subject based on the ideXlab platform.
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a mn doped ni2p nanosheet array an efficient and durable Hydrogen evolution reaction electrocatalyst in alkaline media
Chemical Communications, 2017Co-Authors: Ya Zhang, Gu Du, Abdullah M AsiriAbstract:Developing earth-abundant and high-performance electrocatalysts toward the alkaline Hydrogen evolution reaction (HER) is highly desired. In this communication, we report a Mn-doped Ni2P nanosheet array on nickel foam (Mn-Ni2P/NF) as a high-efficiency electrocatalyst for the HER in alkaline solutions. This Mn-Ni2P/NF can drive 20 mA cm−2 at an overpotential of 103 mV in 1.0 M KOH, which is 82 mV less than that for Ni2P/NF. In addition, it also demonstrates excellent long-term electrochemical durability for at least 25 h. This work offers us a promising catalyst material for water-splitting devices for large-scale production of Hydrogen Fuels.
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high efficiency and durable water oxidation under mild ph conditions an iron phosphate borate nanosheet array as a non noble metal catalyst electrode
Inorganic Chemistry, 2017Co-Authors: Weiyi Wang, Abdullah M Asiri, Danni Liu, Shuai Hao, Yadong Yao, Xuping SunAbstract:It is highly desired but still remains a key challenge to develop iron-based large-surface-area arrays as heterogeneous water oxidation catalysts that perform efficiently and durably under mild pH conditions for solar-to-Hydrogen conversion. In this work, we report the in situ derivation of an iron phosphate–borate nanosheet array on carbon cloth (Fe–Pi–Bi/CC) from an iron phosphide nanosheet array via oxidative polarization in a potassium borate (KBi) solution. As a 3D catalyst electrode for water oxidation at mild pH, such a Fe–Pi–Bi/CC shows high activity and strong long-term electrochemical durability, and it only demands an overpotential of 434 mV to drive a geometrical catalytic current density of 10 mA cm–2 with maintenance of its activity for at least 20 h in 0.1 M KBi. This study offers an attractive earth-abundant catalyst material in water-splitting devices toward the large-scale production of Hydrogen Fuels under benign conditions for application.
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fe doped ni2p nanosheet array for high efficiency electrochemical water oxidation
Inorganic Chemistry, 2017Co-Authors: Jianmei Wang, Abdullah M Asiri, Xuping SunAbstract:In this Communication, we report a high-efficiency electrocatalyst for electrochemical water oxidation based on an Fe-doped Ni2P nanosheet array on a conductive carbon cloth. This catalyst shows a low onset overpotential of 190 mV, and it demands overpotentials of only 215 and 235 mV to drive 50 and 100 mA cm–2, respectively, with high electrochemical durability. This work offers us an attractive earth-abundant 3D catalyst electrode in water-splitting devices toward the mass production of Hydrogen Fuels for applications.
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efficient electrochemical water splitting catalyzed by electrodeposited nife nanosheets film
International Journal of Hydrogen Energy, 2016Co-Authors: Qiong Luo, Xuping Sun, Mingying Peng, Yonglan Luo, Abdullah M AsiriAbstract:Abstract Cost-effective bifunctional oxygen- and Hydrogen-evolving electrocatalysts made from earth-abundant elements are crucial for efficient water splitting. In this communication, we report a versatile and one-step electrodeposition of NiFe nanosheets film on Ni foam (NiFe/NF) as a bifunctional catalytic material with high activity and stability for overall water splitting in basic electrolytes. The two-electrode electrolyzer using NiFe/NF as both anode and cathode can afford current density of 10 mA cm−2 at a cell voltage of 1.64 V, which stimulates the design and development of transition metal alloy nanostructures as attractive bifunctional catalysts for electrochemical production of Hydrogen Fuels.
Mahidzal Dahari - One of the best experts on this subject based on the ideXlab platform.
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a review on the current progress of metal hydrides material for solid state Hydrogen storage applications
International Journal of Hydrogen Energy, 2016Co-Authors: N A A Rusman, Mahidzal DahariAbstract:Abstract Energy is one of the basic requirements in our daily lives. Daily activities such as cooking, cleaning, working on the computer and commuting to work are more or less dependent on energy. The world's energy demand is continuously increasing over the years due to the ever-increasing growth in the human population as well as economic development. At present, approximately 90% of energy demands are fulfilled by fossil Fuels. With the rising demands of energy throughout the globe, it can be expected that the availability of fossil Fuels is depleting at an alarming rate since fossil Fuels are non-renewable sources of energy. In addition, fossil Fuels are the main contributor of greenhouse gas emissions and therefore, they have a detrimental impact on human health and environment in the long term. Hence, there is a critical need to develop alternative sources of energy in replacement of fossil Fuels. Hydrogen Fuels have gained much interest among researchers all over the world since they are clean, non-toxic and renewable, making them suitable for use as substitutes for petroleum-derived Fuels in vehicular applications. However, the greatest challenge in using Hydrogen Fuels lies in the development of Hydrogen storage systems, especially for on-board applications. Hydrogen Fuels can be stored in gaseous, liquid or solid states, and much effort has been made to develop Hydrogen storage systems that are safe, cost-effective, environmental-friendly and more importantly, with high energy densities. Current technologies used for Hydrogen storage include high-pressure compression at about 70 MPa, liquefaction at cryogenic temperatures (20 K) and absorption into solid state compounds. Among the three types of Hydrogen storage technologies, the storage of Hydrogen in solid state compounds appears to be the most feasible solution since it is a safer and more convenient method compared to high-pressure compression and liquefaction technologies. In this regard, metal hydrides are potential chemical compounds for solid-state Hydrogen storage, and a large number of studies have been carried out to synthesize low-cost metal hydrides with low absorption/desorption temperatures, high gravimetric and volumetric Hydrogen storage densities, good resistance to oxidation, good reversibility and cyclic ability, fast kinetics and reactivity, and moderate thermodynamic stability. In general, these studies have shown that the absorption/desorption properties of Hydrogen can be improved by: (1) the addition of catalysts into the metal hydrides, (2) alloying the metal hydrides, or (3) nanostructuring. This review article is focused on the latest developments of metal hydrides for solid-state Hydrogen storage applications, which will be of interest to scientists, researchers, and practitioners in this field.
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a review on the current progress of metal hydrides material for solid state Hydrogen storage applications
International Journal of Hydrogen Energy, 2016Co-Authors: N A A Rusman, Mahidzal DahariAbstract:Abstract Energy is one of the basic requirements in our daily lives. Daily activities such as cooking, cleaning, working on the computer and commuting to work are more or less dependent on energy. The world's energy demand is continuously increasing over the years due to the ever-increasing growth in the human population as well as economic development. At present, approximately 90% of energy demands are fulfilled by fossil Fuels. With the rising demands of energy throughout the globe, it can be expected that the availability of fossil Fuels is depleting at an alarming rate since fossil Fuels are non-renewable sources of energy. In addition, fossil Fuels are the main contributor of greenhouse gas emissions and therefore, they have a detrimental impact on human health and environment in the long term. Hence, there is a critical need to develop alternative sources of energy in replacement of fossil Fuels. Hydrogen Fuels have gained much interest among researchers all over the world since they are clean, non-toxic and renewable, making them suitable for use as substitutes for petroleum-derived Fuels in vehicular applications. However, the greatest challenge in using Hydrogen Fuels lies in the development of Hydrogen storage systems, especially for on-board applications. Hydrogen Fuels can be stored in gaseous, liquid or solid states, and much effort has been made to develop Hydrogen storage systems that are safe, cost-effective, environmental-friendly and more importantly, with high energy densities. Current technologies used for Hydrogen storage include high-pressure compression at about 70 MPa, liquefaction at cryogenic temperatures (20 K) and absorption into solid state compounds. Among the three types of Hydrogen storage technologies, the storage of Hydrogen in solid state compounds appears to be the most feasible solution since it is a safer and more convenient method compared to high-pressure compression and liquefaction technologies. In this regard, metal hydrides are potential chemical compounds for solid-state Hydrogen storage, and a large number of studies have been carried out to synthesize low-cost metal hydrides with low absorption/desorption temperatures, high gravimetric and volumetric Hydrogen storage densities, good resistance to oxidation, good reversibility and cyclic ability, fast kinetics and reactivity, and moderate thermodynamic stability. In general, these studies have shown that the absorption/desorption properties of Hydrogen can be improved by: (1) the addition of catalysts into the metal hydrides, (2) alloying the metal hydrides, or (3) nanostructuring. This review article is focused on the latest developments of metal hydrides for solid-state Hydrogen storage applications, which will be of interest to scientists, researchers, and practitioners in this field.
Xuping Sun - One of the best experts on this subject based on the ideXlab platform.
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high efficiency and durable water oxidation under mild ph conditions an iron phosphate borate nanosheet array as a non noble metal catalyst electrode
Inorganic Chemistry, 2017Co-Authors: Weiyi Wang, Abdullah M Asiri, Danni Liu, Shuai Hao, Yadong Yao, Xuping SunAbstract:It is highly desired but still remains a key challenge to develop iron-based large-surface-area arrays as heterogeneous water oxidation catalysts that perform efficiently and durably under mild pH conditions for solar-to-Hydrogen conversion. In this work, we report the in situ derivation of an iron phosphate–borate nanosheet array on carbon cloth (Fe–Pi–Bi/CC) from an iron phosphide nanosheet array via oxidative polarization in a potassium borate (KBi) solution. As a 3D catalyst electrode for water oxidation at mild pH, such a Fe–Pi–Bi/CC shows high activity and strong long-term electrochemical durability, and it only demands an overpotential of 434 mV to drive a geometrical catalytic current density of 10 mA cm–2 with maintenance of its activity for at least 20 h in 0.1 M KBi. This study offers an attractive earth-abundant catalyst material in water-splitting devices toward the large-scale production of Hydrogen Fuels under benign conditions for application.
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fe doped ni2p nanosheet array for high efficiency electrochemical water oxidation
Inorganic Chemistry, 2017Co-Authors: Jianmei Wang, Abdullah M Asiri, Xuping SunAbstract:In this Communication, we report a high-efficiency electrocatalyst for electrochemical water oxidation based on an Fe-doped Ni2P nanosheet array on a conductive carbon cloth. This catalyst shows a low onset overpotential of 190 mV, and it demands overpotentials of only 215 and 235 mV to drive 50 and 100 mA cm–2, respectively, with high electrochemical durability. This work offers us an attractive earth-abundant 3D catalyst electrode in water-splitting devices toward the mass production of Hydrogen Fuels for applications.
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efficient electrochemical water splitting catalyzed by electrodeposited nife nanosheets film
International Journal of Hydrogen Energy, 2016Co-Authors: Qiong Luo, Xuping Sun, Mingying Peng, Yonglan Luo, Abdullah M AsiriAbstract:Abstract Cost-effective bifunctional oxygen- and Hydrogen-evolving electrocatalysts made from earth-abundant elements are crucial for efficient water splitting. In this communication, we report a versatile and one-step electrodeposition of NiFe nanosheets film on Ni foam (NiFe/NF) as a bifunctional catalytic material with high activity and stability for overall water splitting in basic electrolytes. The two-electrode electrolyzer using NiFe/NF as both anode and cathode can afford current density of 10 mA cm−2 at a cell voltage of 1.64 V, which stimulates the design and development of transition metal alloy nanostructures as attractive bifunctional catalysts for electrochemical production of Hydrogen Fuels.
N A A Rusman - One of the best experts on this subject based on the ideXlab platform.
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Performance analysis of metal hydride-based Hydrogen storage system / Nur Ain Amirah Rusman
2018Co-Authors: N A A RusmanAbstract:Energy is one of the basic requirements in our daily lives. The world’s energy demand is continuously increasing over the years due to the ever-increasing growth in the human population as well as economic development. At present, approximately 90% of energy demand are fulfilled by fossil Fuels. With the rising demands of energy throughout the globe, it can be expected that the availability of fossil Fuels is depleting at an alarming rate since fossil Fuels are non-renewable sources of energy. In addition, fossil Fuels are the main contributor of greenhouse gas emissions and therefore, they have a detrimental impact on human health and environment in the long term. Hence, there is a critical need to develop alternative sources of energy in replacement of fossil Fuels. For that reason, Hydrogen Fuels have gained much interest among researchers all over the world since they are clean, non-toxic and renewable energy source. However, the greatest challenge in using Hydrogen Fuels lies in the development of Hydrogen storage systems, especially for on-board applications. Current technologies used for Hydrogen storage include highpressure compression at about 70 MPa, liquefaction at cryogenic temperature (20 K) and absorption into solid state compounds. Among the three types of Hydrogen storage technologies, the storage of Hydrogen in solid state compounds appears to be the most feasible solution since it is a safer and more convenient. Because of that, Hydrogen stored in solid state as metal hydride has been studied for this project. In this project, a threedimensional dynamic simulation for metal hydride based Hydrogen storage tank was performed using Computational Software COMSOL 5.1a Multiphysics. The software is used to simulate the charging process in the metal hydride container that is able to represent the system’s behavior. The model consists of a system of partial differential equations (PDE) describing three dimensional heat and mass transfer of Hydrogen in a porous matrix and has been implemented in a finite element program that allows obtaining results on the charging variables at different studied scenarios. The model is validated against published data and later the simulation result is compared with experimental data to validate experimentally the numerical simulation. The effects of different parameters such as porosity (ε), permeability
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a review on the current progress of metal hydrides material for solid state Hydrogen storage applications
International Journal of Hydrogen Energy, 2016Co-Authors: N A A Rusman, Mahidzal DahariAbstract:Abstract Energy is one of the basic requirements in our daily lives. Daily activities such as cooking, cleaning, working on the computer and commuting to work are more or less dependent on energy. The world's energy demand is continuously increasing over the years due to the ever-increasing growth in the human population as well as economic development. At present, approximately 90% of energy demands are fulfilled by fossil Fuels. With the rising demands of energy throughout the globe, it can be expected that the availability of fossil Fuels is depleting at an alarming rate since fossil Fuels are non-renewable sources of energy. In addition, fossil Fuels are the main contributor of greenhouse gas emissions and therefore, they have a detrimental impact on human health and environment in the long term. Hence, there is a critical need to develop alternative sources of energy in replacement of fossil Fuels. Hydrogen Fuels have gained much interest among researchers all over the world since they are clean, non-toxic and renewable, making them suitable for use as substitutes for petroleum-derived Fuels in vehicular applications. However, the greatest challenge in using Hydrogen Fuels lies in the development of Hydrogen storage systems, especially for on-board applications. Hydrogen Fuels can be stored in gaseous, liquid or solid states, and much effort has been made to develop Hydrogen storage systems that are safe, cost-effective, environmental-friendly and more importantly, with high energy densities. Current technologies used for Hydrogen storage include high-pressure compression at about 70 MPa, liquefaction at cryogenic temperatures (20 K) and absorption into solid state compounds. Among the three types of Hydrogen storage technologies, the storage of Hydrogen in solid state compounds appears to be the most feasible solution since it is a safer and more convenient method compared to high-pressure compression and liquefaction technologies. In this regard, metal hydrides are potential chemical compounds for solid-state Hydrogen storage, and a large number of studies have been carried out to synthesize low-cost metal hydrides with low absorption/desorption temperatures, high gravimetric and volumetric Hydrogen storage densities, good resistance to oxidation, good reversibility and cyclic ability, fast kinetics and reactivity, and moderate thermodynamic stability. In general, these studies have shown that the absorption/desorption properties of Hydrogen can be improved by: (1) the addition of catalysts into the metal hydrides, (2) alloying the metal hydrides, or (3) nanostructuring. This review article is focused on the latest developments of metal hydrides for solid-state Hydrogen storage applications, which will be of interest to scientists, researchers, and practitioners in this field.
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a review on the current progress of metal hydrides material for solid state Hydrogen storage applications
International Journal of Hydrogen Energy, 2016Co-Authors: N A A Rusman, Mahidzal DahariAbstract:Abstract Energy is one of the basic requirements in our daily lives. Daily activities such as cooking, cleaning, working on the computer and commuting to work are more or less dependent on energy. The world's energy demand is continuously increasing over the years due to the ever-increasing growth in the human population as well as economic development. At present, approximately 90% of energy demands are fulfilled by fossil Fuels. With the rising demands of energy throughout the globe, it can be expected that the availability of fossil Fuels is depleting at an alarming rate since fossil Fuels are non-renewable sources of energy. In addition, fossil Fuels are the main contributor of greenhouse gas emissions and therefore, they have a detrimental impact on human health and environment in the long term. Hence, there is a critical need to develop alternative sources of energy in replacement of fossil Fuels. Hydrogen Fuels have gained much interest among researchers all over the world since they are clean, non-toxic and renewable, making them suitable for use as substitutes for petroleum-derived Fuels in vehicular applications. However, the greatest challenge in using Hydrogen Fuels lies in the development of Hydrogen storage systems, especially for on-board applications. Hydrogen Fuels can be stored in gaseous, liquid or solid states, and much effort has been made to develop Hydrogen storage systems that are safe, cost-effective, environmental-friendly and more importantly, with high energy densities. Current technologies used for Hydrogen storage include high-pressure compression at about 70 MPa, liquefaction at cryogenic temperatures (20 K) and absorption into solid state compounds. Among the three types of Hydrogen storage technologies, the storage of Hydrogen in solid state compounds appears to be the most feasible solution since it is a safer and more convenient method compared to high-pressure compression and liquefaction technologies. In this regard, metal hydrides are potential chemical compounds for solid-state Hydrogen storage, and a large number of studies have been carried out to synthesize low-cost metal hydrides with low absorption/desorption temperatures, high gravimetric and volumetric Hydrogen storage densities, good resistance to oxidation, good reversibility and cyclic ability, fast kinetics and reactivity, and moderate thermodynamic stability. In general, these studies have shown that the absorption/desorption properties of Hydrogen can be improved by: (1) the addition of catalysts into the metal hydrides, (2) alloying the metal hydrides, or (3) nanostructuring. This review article is focused on the latest developments of metal hydrides for solid-state Hydrogen storage applications, which will be of interest to scientists, researchers, and practitioners in this field.
Jiaguo Yu - One of the best experts on this subject based on the ideXlab platform.
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trace level phosphorus and sodium co doping of g c 3 n 4 for enhanced photocatalytic h 2 production
Journal of Power Sources, 2017Co-Authors: Qian Huang, Jiaguo YuAbstract:Abstract The conversion of solar energy into Hydrogen Fuels by semiconductor photocatalysts has been paid great attention in recent years. g-C 3 N 4 has emerged as a rising star in this area for its numerous advantages. In this work, trace-amount phosphorus and sodium co-doped g-C 3 N 4 is prepared by polymerizing the mixed precursors of melamine and sodium tripolyphosphate. The resultant photocatalyst exhibits remarkably enhanced photocatalytic performance in H 2 production. Experimental analysis and theoretical calculation indicate that such performance enhancement is mainly due to the improved charge transfer and separation resulting from the interstitial doping of sodium and phosphorus, as well as the more porous structure with enlarged specific surface area.
